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Concentrated Stock Risk: How One Move Could Cost $400,000

A 64-year-old tech executive's story highlights the dangers of concentrated stock positions: she holds $1.6 million in a single employer stock with a low cost basis, and a poorly timed sale could trigger a $400,000 tax liability.

June 13, 2026
2 min read
Source: 24/7 Wall St.
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Key Numbers

portfolio value
$1.6 million
cost basis
$240,000
embedded gain
$1.36 million
potential tax
$400,000

A 64-year-old software executive's situation underscores the significant financial risks of concentrated stock holdings. According to a report from 24/7 Wall St., she has $1.6 million tied up in a single employer stock, with a cost basis of just $240,000. This means roughly $1.36 million in unrealized long-term capital gains, and a wrong move could result in a tax bill of up to $400,000.

Details

The executive, who leaves her job in January, will have no W-2 income, owns a paid-off house, and has a 401(k). This scenario illustrates a common challenge for investors with concentrated stock positions: how to diversify without incurring a massive tax hit.

Context

Concentrating wealth in a single stock carries significant risk, especially if it represents a large portion of the investor's portfolio. In this case, a drop in the stock price could wipe out a substantial part of her net worth. Additionally, selling all at once could push her into a higher tax bracket.

What This Means for Investors

Investors with concentrated positions in their company stock should consider strategies such as gradual selling, using tax-managed ETFs, or donating shares to charity to reduce the tax burden. Consulting a financial and tax advisor is crucial before making any decisions.

Frequently Asked Questions

Concentrated stock means holding a large portion of your portfolio in one stock, increasing risk if the stock drops. Selling can also trigger large taxes.

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This article was rewritten in Wrqti's editorial style based on information from the original source above. Content is informational only — not investment advice.